Impressive antique marquise shaped opal and diamond ring.  Natural light opal size 8mm x 6mm x 2.8mm, cut oval cabachon, surrounded by 18 graduated Old European cut diamonds and 4 smaller diamonds, claw set, with gallery underrail on a fine half round band, in 18ct yellow gold.  Estimated total diamond weight 1.48ct.  This ring is a size K and can be safely sized by our expert jewellers. This ring is unique and once sold cannot be replaced.